When beginning a post in "Pets," the system should present four check boxes:
(check box 1) X - I have a dog, cat, or rabbit who needs a home.
(check box 2) X - I have another pet who needs a home.
(check box 3) X - I have a pet to breed (stud or bitch)
(check box 4) X - Other.

When Check box 1 is selected, the posting screen provides fields for the following information:
1. Type of animal (dog, cat, puppy, kitten, rabbit).
2. Adoption fee.
3. Text: "Craigslist does not allow the retail sale of pets, only the adoption or rehoming of pets. All cats, dogs and rabbits must be spayed or neutered before being rehomed. If your pet is not spayed or neutered, click here for a list of affordable spay and neuter resources."
3a. Spay/Neuter date.
3b. Veterinarian or Organization who performed the spay/neuter.
4. Subject Line/Location (no changes to current system)
5. Copy/Content. (no changes to current system)

When Check box 2 is selected, the posting screen provides fields for the following information:
1. Type of animal (All animals except for dogs, cats, puppies, kittens, rabbits). "If you are rehoming a dog, cat, kitten, puppy or rabbit, go here." (Refers them to the posting screen above)
2. Adoption fee.
3. Subject Line/Location. (no changes to current system)
4. Copy/Content. (no changes to current system)

When Check box 3 is selected, the screen provides the following information:
"Breeding is a difficult business. Poor breeding practices have led to animals with unstable temperaments and poor health. This contributes to the overpopulation and killing of unwanted animals. Craigslist does not allow ads that solicit breeding, recognizing that responsible breeders do not use this vehicle to find homes for their animals."

No posting box is provided.

When Check box 4 is selected, it would lead to a regular posting screen that says at the top:
"Craigslist does not allow ads which include selling animals for profit, soliciting breeding, or soliciting fighting animals. If this post contains any of that content, it will be deleted."

Current posting screen would not change.

In addition, the following words should be tagged as blocked (or as a warning), in the Pets Section, as well as the General For Sale section:

"dog for sale"
"dogs for sale"
"puppy for sale"
"puppies for sale"
"cat for sale"
"cats for sale"
"kitten for sale"
"kittens for sale"
"rabbit for sale"
"rabbits for sale"
"bitch in heat"
"ready to stud"
"ready to breed"