A growing number of Americans are giving up their dogs and cats to animal shelters as the emotional bonds between people and pets get tested by economic ones.

From the Malvern, Pa., man who turned his two dogs over to help pay for his mother's cancer treatments, to the New York woman who euthanized her cat rather than keeping it alive with expensive medications, rising economic anxieties make it increasingly difficult for some pet owners to justify spending $1,000 a year or more on pet food, veterinary services and other costs.

The population growth at animal shelters in Connecticut, Nebraska, Texas, Utah and other states shows how the weak economy is also shrinking the pool of potential adopters. And it coincides with a drop-off in government funding and charitable donations.

The effect has been cramped quarters for dogs and cats, a faster rate of shelters euthanizing animals and some shelters turning away people looking to surrender pets, according to interviews with several shelters and animal advocates. Of the estimated 6 million to 8 million dogs and cats sent to animal shelters every year, half are euthanized and the rest adopted, according to the Humane Society of the United States.

"It's definitely discouraging for us," said Adam Goldfarb, a Humane Society spokesman. "One of our major goals is to develop and celebrate the bond between people and animals. It's so tragic when families reach a point when they can't afford to care for their pets."

With two children, a husband on disability and a difficult job search of her own, 23-year-old Mel Bail of Worcester, Mass., had begun feeding leftovers from family meals to her three cats — Rory, Ozzy and Mudpie — before recently deciding to give them up.

"When I couldn't pay my gas bill, I knew I had to find another home for the cats," Bail said.

But it wasn't easy to find a shelter that would accept them. "They're completely full," said Bail, who turned to online ads to find homes for the cats.

OWNERS CUT BACK

There are no nationwide data on the reasons dogs and cats are being abandoned, but shelter managers and advocates for animals say the trend is undeniable — and probably a bigger phenomenon than they are aware of.

"People are embarrassed to admit that's why they're giving up their pets," said Betsy McFarland, the Humane Society's director of communications for companion animals.

An Associated www.Press-Petside.com poll found that one in seven owners nationwide reported reduced spending on their pets during the past year's recession. Of those cutting back, more than a quarter said they considered giving up their pet.

The average annual cost of owning a dog is about $1,400, while the average annual cost of a cat is about $1,000, according to a survey conducted by the American Pet Products Association. The survey suggests there are some 231 million pets — excluding fish — in more than 71 million homes in America.

In New York, Erin Farrell-Talbot decided to euthanize her 15-year-old cat, Buki, when she was told within days of losing her job that he would need thousands of dollars in treatment and medications costing $65 a month.

"When it came down to whether I was going to charge food for the month of September or give medicine to my cat, that was a clear decision for me," Farrell-Talbot said. "It was horrible. It killed us."

The Animal Humane Association in Albuquerque, N.M., saw 69 dogs and cats turned over through September because the owners couldn't afford to keep them. That compares with 48 in the same period in 2007 — a 44 percent increase, said executive director Peggy Weigle.

In response, Weigle's shelter opened its emergency pet shelter — normally reserved for battered women needing a place to keep their pets — to those suffering financially. So far this year, 45 pets have been taken in through the emergency program, compared with eight last year.