They need to sleep a lot to stay healthy. They have to sleep 10-12 hrs.
yes
10hrs
bad parenting
The 16 yr old would need to be on the same mature level as the 20 yr old. And the 20 yr old would have to move slower than he/she would have to with another 20 yr old.
No its forbidden
8-10 hours
8-10 hours
Perfectly ok
8-10 hours
roughly 6 hours
approximately 8 to 10 hours
No, he is old all old dogs do that.