Tenant wanting to replace carpets with lamoinate

Maintenance

Hello, looking for some advice if anyone has had similar situation...

I have a tenant in for 3 years since, i bought the terraced house, and seems keen to stay long term. She is a bit unreliable in terms of contact and I have some suspicions she has people stay round longer than she should without telling me, but otherwise pays on time and is fine. Just a bit of a worry.

I allowed pets at the time she moved in and am starting to regret this, as she has two small dogs and I don't thinks she's properly trained them. On my last visit I witnessed one taking a cr*p on the carpet!!

I'll be telling her she needs to get them trained properly to do their business in the yard as they will be damaging the current carpets (which are probably at least 5 years old) and remind her I only allowed pets because seh assured me they were trained and well behaved.

But, she mentioned she'd like to replace the carpets and get laminate in the hall, back living area and breakfast room and suggested this at her own cost.

I'm worried about this as 1) she may not do a good job and then I'll have to pay more to fix it, 2) she is clearly not taking good enough care right now and so is the replacement just because she will find it easier to clean pet 'mess' up without using a carpet cleaner (which she admits she does often - vax) and 3) does this give her any extra rights if she pay to put laminate in herself?

I feel like I should pay for the laminate if the flooring is wearing out (which is only slightly - probably because of her frequent vaxxing) but if it is because of damage should she be doing this? Or is it a fair compromise to pay for half with her, acknowledging my concerns that the damage may be because of her pets and on the condition she trains them properly.

Any guidance or experience would be appreciated! I will not allow pets again after this!!

Thank you
Matt