A silent lease generally is not a prohibition, and courts in most states read it that way. It is still not permission, and here is why to ask anyway.
Only the deposit is ever in play. Landlords must itemize deductions, and in some states missing the return deadline forfeits deductions entirely.
Under a joint and several liability clause, a landlord can pursue you for the full cost of your roommate's pet damage. What to write down first.
Leashed, service elevator only, or carried with no paws on the floor. These live in house rules, which can change without your lease being reissued.
Most buildings restrict pet bedding in communal machines, and the reason is the drain, not hygiene. The de-fur-first routine, and what to buy instead.