AIBU to say adult DD cannot have a pet?

[HiWorld]

I honestly have no idea if I'm being unreasonable!

DD (19) lives at home (full time job) and would like a hamster. She had hamsters as a kid and never cleaned them out and it was always left to me, swore never again. She says it was because they were from pet shops and they were not handled properly by them so used to bite. She says she has researched breeders who handle them from babies. However, I still can't imagine her cleaning it out! I don't want that stinking out her room!

Plus, we have cats!! She says she can shut her door and thinks her room is her space... I do agree but the reality is, is till her final say, right?

She did want rats but I wouldn't even be able to look at them

Charge Hamster rent, tell her she can have it but the charge is £50 per week and double if you need to clean it out.

I wouldn't but only on the basis that you don't want pets in your house. She's an adult and as such is responsible for her own animals. But if you don't want a hamster in the house then just say no.

I had lots of pets growing up, but eventually my mum said I could have whatever animals I wanted when I moved into my own house. Fair enough really.

Incidentally, rats are vile and I wouldn't allow them under my roof under any circumstances.

Another vote for rats, I had had hammys when a child and my mum ended up looking after them as they were never awake when I was so lost interest, I was desperate for rats but was told no. In the end I smuggled a rat and cage etc in to my room when I was about 14, managed to keep it a secret for a few days even. When my parents found out they were cross, but let me keep it, then get it a friend, then a bigger cage, then more rats as I proved myself capable of looking after them.

I'm in my mid 30s now and currently have 8 of the terrors (we rent and most landlords are happy for caged animals even if it says no pets) nearly 5 year old DC loves them and always has one or more stuffed down his top
Even my mum who always declared to hate rats and not stand the sight of them soon came round to their cute fuzzy little faces and now often visits the 'grandrats' and brings them treats.

Rats are unlikely to be bothered by the presence of cats too.

@TheRealBiscuitAddict how are they vile?