No, I haven't seen it mentioned somewhere. Checked the wiki just in case it's mentioned, and it struck me that in this case, the German and English wiki entries on FW 2 are utterly different. Not just because the German wiki entry is way more detailed (though no mention of dogs), but because the English entry is all "Fritz' concerns about his successor proved themselves to be justified" (i.e. traditional 19th century take), whereas the German entry is "Fritz systematically non-stop humiliated his successor and destroyed his reputation before he ever had the chance to acquiring it because, like Robert Graves' version of the Julian-Claudian emperors, he wanted his own glory to shine all the brighter", with FW2 pointedly not being allowed near his dying uncle, as would have been the custom even with estranged princes, one last deliberate humilitation. (He also had not been taught statescraft or allowed to participate in government in any way - he did have duties, just not those - and thus in this regard was as unprepared as MT had been when taking over.)
Now, the one thing Fritz and FW2 appeared to have in common is love of music; FW 2' instrument of choice was the cello, which practiced sometimes up to four hours a day, belying the idea he was unable to focus on anything. But his working statebusiness hours were ridiculously low compared with workoholic Fritzes, that's true, one of many ways he fashioned himself as the opposite of his uncle, and they were so many that I wouldn't be surprised if FW2 was a cat person just because of that.
It has to be said, though, that Fritz came by this nephew dislike honestly. The kid was taken from AW & wife & household of same at age 3 because it was the future crown prince, and raised by Fritz-appointed people exclusively. His schedule at age 4 were verbal German and French lessons in the morning, reception of courtiers at noon, writing French and German lessons in the afternoon, then play time but play time consisting of having to replay the lessons received during the day with dolls, then public dinner with courtiers. (A few years later, maths, history, geography, military drill and law were added.) When Fritz was told little FW was shy, he said the courtiers were to tease him as often as possible, so he'd get rid of that shyness post haste. (German wiki quotes from a letter from Fritz to AW to that effect, with Fritz telling his brother what he's ordered for his brother's son.) Then AW's own public humiliation and early death happen.
Net result: young FW is into women, forms life long attachment to later maitresse en titre Wilhelmine Encke (we talked about her), finds religion and spiritism for good measure, changes the theatre program in Berlin from French plays to Schiller plays soon as Fritz has breathed his last, stops French as the official court language in favour of German, stops the Hohenzollern/Habsburg dualism in favour of an alliance (due to the French Revolution as much as because of any uncle issues, though), has all 29 royal rooms in the Berlin Hohenzollern palace (i.e. the one in the city itself, not Potsdam or Sanssouci) refurnished from Rokoko into neoclassical), and ignores Fritz' orders re: burial in favour of a daylight pomp and circumstance funeral ending with Fritz getting buried next to FW1. So yes, I'd say FW 2 could hold a grudge. But nothing I've read about him makes it sound like he was the type to take said grudge out on animals. Also, Heinrich was still alive and well at that point, and I dare say would have objected. If I were to make stuff up, I'd go for the irony of Heinrich ending up with the dogs. Or Wilhelmine the mistress does, who is depicted with dogs (though little ones) in some of her portraits and definitely liked them.
Re: Fritz's death
No, I haven't seen it mentioned somewhere. Checked the wiki just in case it's mentioned, and it struck me that in this case, the German and English wiki entries on FW 2 are utterly different. Not just because the German wiki entry is way more detailed (though no mention of dogs), but because the English entry is all "Fritz' concerns about his successor proved themselves to be justified" (i.e. traditional 19th century take), whereas the German entry is "Fritz systematically non-stop humiliated his successor and destroyed his reputation before he ever had the chance to acquiring it because, like Robert Graves' version of the Julian-Claudian emperors, he wanted his own glory to shine all the brighter", with FW2 pointedly not being allowed near his dying uncle, as would have been the custom even with estranged princes, one last deliberate humilitation. (He also had not been taught statescraft or allowed to participate in government in any way - he did have duties, just not those - and thus in this regard was as unprepared as MT had been when taking over.)
Now, the one thing Fritz and FW2 appeared to have in common is love of music; FW 2' instrument of choice was the cello, which practiced sometimes up to four hours a day, belying the idea he was unable to focus on anything. But his working statebusiness hours were ridiculously low compared with workoholic Fritzes, that's true, one of many ways he fashioned himself as the opposite of his uncle, and they were so many that I wouldn't be surprised if FW2 was a cat person just because of that.
It has to be said, though, that Fritz came by this nephew dislike honestly. The kid was taken from AW & wife & household of same at age 3 because it was the future crown prince, and raised by Fritz-appointed people exclusively. His schedule at age 4 were verbal German and French lessons in the morning, reception of courtiers at noon, writing French and German lessons in the afternoon, then play time but play time consisting of having to replay the lessons received during the day with dolls, then public dinner with courtiers. (A few years later, maths, history, geography, military drill and law were added.) When Fritz was told little FW was shy, he said the courtiers were to tease him as often as possible, so he'd get rid of that shyness post haste. (German wiki quotes from a letter from Fritz to AW to that effect, with Fritz telling his brother what he's ordered for his brother's son.) Then AW's own public humiliation and early death happen.
Net result: young FW is into women, forms life long attachment to later maitresse en titre Wilhelmine Encke (we talked about her), finds religion and spiritism for good measure, changes the theatre program in Berlin from French plays to Schiller plays soon as Fritz has breathed his last, stops French as the official court language in favour of German, stops the Hohenzollern/Habsburg dualism in favour of an alliance (due to the French Revolution as much as because of any uncle issues, though), has all 29 royal rooms in the Berlin Hohenzollern palace (i.e. the one in the city itself, not Potsdam or Sanssouci) refurnished from Rokoko into neoclassical), and ignores Fritz' orders re: burial in favour of a daylight pomp and circumstance funeral ending with Fritz getting buried next to FW1. So yes, I'd say FW 2 could hold a grudge. But nothing I've read about him makes it sound like he was the type to take said grudge out on animals. Also, Heinrich was still alive and well at that point, and I dare say would have objected. If I were to make stuff up, I'd go for the irony of Heinrich ending up with the dogs. Or Wilhelmine the mistress does, who is depicted with dogs (though little ones) in some of her portraits and definitely liked them.