i use it on my dogs aswell as doing the ferrets at same time touch wood never seen owt on any for 4yrs or more since using this stuff and well cheap enough get 6pippets for dogs over 15kg for around 7quid
there aint many genuine firstxs out there now I think if that's what you want get it done im sure youd get homes for them but you shouldn't have to ask oppinions
the ones I had were spot on and were fast enough for owt