Why do you deduce mainecooon cats deed approaching dogs?

i have two kittens.
they growl.
they chase you.
they carry toys around in their mouths.
they'll drink just about anything.
one pants resembling a dog.

it's quite amusing, but why do you think they act approaching dogs?
How can i convince my mom to...
Answers:    their kittens and their coons. their very smart and they have to amuse themselves. My coon is the lazyest cat you will ever see. he gives Garfield a run for his lasagna and i love him to annihilation!
Does anyone know of any cat rescue groups and/or free spaying/neutering for low income family . PLZ HELP?   Do cats enjoy emotion? ?   How elderly do cats hold to be past they can walk into the cattery? (UK)?   Please assist...I ponder I found a lump on my cat...?