Magic Forums

Hello everyone!
I a man fairly new to this site and have wondered a few things about the spells of here regarding the conjuration of a familiar of sorts, for example one Ina normal form such as a dog or cat.
Are these spells plausible and if so, real? Or are they fake and/or considered "fluff" spells?
Next, has anyone successfully done one of these spells with a accountable results?
Third, for sale of the question we will assume the spells are real, is it possible to have more than one familiar at one time? Or would they be aggressive towards each other, or would it just plain not be possible?
Any and all answers are appreciated!
Thanks! ^_^