The can't keep flying all the time. Mid-air mating is acrobatic enough, but mid-air egg-laying is unlikely to work out well.
no flowing of blood in the feet of birds
Assuming the dogs have four feet and birds two, you need 15 dogs (60 feet) and 1 bird (2 feet) giving a total of 16 birds and dogs and 62 feet. None. Dogs have paws, not feet. Also, birds have claws, not feet.
Mainly webbed feet are seen on swimming birds
You can tell that birds naturally clench their feet because their feet are rolled up in a ball
Pigeon's feet are much the same as most other birds.
All birds have two feet.
yes, unless it is disformed, all birds are born with 2 legs/feet!
The type of feet bird have can vary by species. Many types of birds have three toes which point forward and one that points backwards. This type of foot allows them to perch and hold onto branches.
There are 13 birds in the cage.
Of course, if you look at a birds feet it will look scaly
how does an animals feet sivies
It depends on the bird. Typically, water fowl (like ducks) have webbed feet (with some exceptions.) Other birds do not.