They can't swim, so yea they would drown.
Since they're pregnant for more than a year, less than one.
Less than one. A female hippo will not start ovulating until about 17 months after getting pregnant.
none
Yes, if they are under the water, because babies don't know how to hold their breath like kids or adults do!! Darp Passenger: However, until a certain point in their life, all human babies have a natural defense mechanism in their throat that diverts the water they try breathe into their stomach. This won't prevent them from dying of asphyxiation (not getting enough air) so don't go recklessy throwing your kid into the water!
one a year
Yes. I have a friend and she has gerbils that are over one year old. They have had babies. In a gerbils lifespan gerbils have around 15 litters of babies.
One in 10 thousand babies are born with Dwarfism every year.
about one year
1
it depends
Only one calf a year.
2 kids