okay, two questions

one, my 11 week old degus weigh 185 and 175g is that too muh or not enough or what, i dont thinik they are fully grown yet so im not sure

and two, one of my degus (the fat and blind one) o0nly has four fingers on hisleft front paw, he was licking/nibbling the piinkey-brown stump earlier and i think it may be recent, is it due to inbreeding because im fairly sure he is as he has cataracts and i read this is a result in inbreeding as i susspect he had it from birth?