Butters, a 5-year-old Sharpei mix, has been housed at the Pima Animal Care Center longer than any other animal at the shelter.

Picked up on May 18 at the Randolph North Golf Course, he's mellow, affectionate and gets along great with other dogs, shelter staff say.

Now he needs a real home.

PACC, at 4000 N. Silverbell Road, continues to struggle with severe overcrowding, with 45 to 90 animals turned in daily, said Justin Gallick, PACC's animal care advocate.

In addition, he said the shelter has made a commitment to try to save more lives and so is holding on to some animals longer while also working with about 50 rescue groups to find homes.

Starting Friday, PACC will run a Forget-Me-Not Special to help Butters and the shelter's 71 other longest-staying guests find homes within 72 hours.

Every one of the 72 animals on the list will be free Friday through Sunday. License fees, which are $15 for spayed or neutered dogs, still apply.

Shelter officials say it's hard to say why some dogs get overlooked at the shelter, although there are a variety of reasons. Sometimes, they're shy and frightened, so their personalities don't shine through. Conversely, sometimes they're a little too excited about the prospect of going home.

They're usually adults and usually mixed breeds and they don't get the attention that some of the puppies or purebreds do.

But the amount of time they stay in the shelter is no reflection of the type of family member they'll be once they are exposed to love and attention, Gallick said.

PACC is open from 10 a.m. until 5 p.m. weekends and from noon until 7 p.m. on weekdays.