no they dont
Legs that have joints in them.
Dogs have 4 legs.
ANY animal that has a skeleton has joints.
It can be a contributing factor. as can be osteoporosis.
There are 40 legs on 10 dogs.
3
One
Arthropoda.
Five dogs would have a total of 20 legs. Each dog has 4 legs, so when you multiply 4 legs by 5 dogs, you get a total of 20 legs.
Each dog has 4 legs, so 6 dogs have a total of 24 legs.
There are 48 dogs legs (12x4) and 3216 cats legs (804x4) so in total there are 3264 legs
Dogs and insects both have apendages used for moving around, observing this similarity people use the same name to deceive all of them, legs. However to be homologous they must have been inherited by a shares ancestor (common ancestor). Going back in time from the dogs this is an ancestral creature earlier than the earliest vertabrates, before the bony fishes. Considering this it is easy to imagine these distantly related organisms (dogs and fish) did not both inherit the characteristic of having legs from a common ancestor. Therefor legs of dogs and insects are analogous, not homologous.