A former dog shelter volunteer was sentenced to two years probation today and ordered to stay away from animals after he was caught having sex with a basset hound outside the shelter. Gustavo Castanon also will get surprise visits from probation officers at his home to ensure there are no animals there, said Denver District Judge Robert B. Crew Jr. Castanon will remain in the Denver County Jail for another 10 days on an immigration hold. If Immigration and Customs Enforcement officials don't pick him up by then, he will be released and begin his probation, Crew said.

Castanon was dismissed as a volunteer at Denver's Municipal Animal Shelter after being spotted in late September by an employee behind the building with the dog. Castanon was half-naked and coaxing the dog to perform oral sex, the police report said. Castanon has remained jailed on animal cruelty charges, unable to come up with $10,000 bail. Castanon was convicted in 1998 of exposing himself at Cheesman Park, according to court records.