1. Do only male cats spray or do females do that too?
I think they both are capable of doing this...

2. Does nutering/spaying them take care of that problem?
Not always, spraying is more of a territorial issue.

3. Do cats shed alot?
Depends on the breed. The long haired cats fur is more noticable, but I find short hair at home too.

4. On average for a healthy cat, how much does it cost to get their annual shots and check up?
At our vet, a check up costs $25.00. Shots run from $12-$16. But, at shot clinics, are much more reasonable.

5. Dogs go on Heartworm Meds every month, is there something that Cats have to take every month to prevent something?
Not that I know of

6. On average, how much worth of food does a cat consume per month? (I am not sure what brands are the best, but they would be interested in giving it the price equivalence of Nutro or Eukanuba)
We feed our four cats Royal Canin. We buy two 7 lbs bags that last at least three weeks. For the two bags, we only pay about $35.00. So I would say about $40, for four cats. I think (someone correct me if I'm wrong) that if you buy a more high quality food, they don't need to eat as much food.

7. Do cats claw at furniture, bedding, etc... because they are bored?
No...cats claw furniture because they haven't been trained to use the proper "equipment"....a scratching post. Cat's are very easily trained to do this. They are malicious just because they are bored. (Sorry, I just gave a speech in Toastmasters this morning on "Declawing....not an option"...so I'm still revving! ) The reason cats claw at all is to stretch their muscles. Here's a really good site for information on declawing as an FYI:Declawing

8. How easy is it to train your cat to use the litterbox?
VERY easy...they usually come trained. If not, they kind of figure it out if you show them where the box is.