Lease Renewal - Large 60 lb dog (PET FEE?)

[Chris Park]

Hi all, newbie here and looking for advice on a lease renewal on a great tenant. Pretty much an ideal tenant but now would like to include a 60 lb shepherd to a small 1 bedroom apartment in NY. Looks like if she can't keep the dog she'll have to move. Never dealt with large dogs in the past, so any advice would be deeply appreciated. Thanks!