so sorry
last night my 7month old girl fell off my bed, luckily we didn't get broken bones, her knee went out of place and the vet ended up telling me that she has a luxating patella in both legs...
The best way to avoid the accident again is to either get pet stairs or don't leave him unattended on the bed.
I can't fit stairs in my room so I just don't leave her on my bed without me now.
I imagine your baby will have a hard time getting around with the casts on, I dealt with a cat with one back leg broken and he had some trouble walking with it. The vet will probably send you home with some pain killers.