So you're leaving town for a while and the age-old question of what to do with Fido is again rearing its ugly, scruffy head. You could try to con your best buddy into walking and feeding the mutt, but that almost torpedoed your friendship last time. Besides, when you returned, your floppy-eared companion seemed thin and attention starved. Fortunately there is a kennel that is trustworthy and probably will treat the pooch better than you do. Because El Saba started out as a dog breeding outfit, its facilities are a sight nicer than your average doggie-overnight joint. The pups are housed in seventeen-foot-long runs equipped with sliding doors that lead to air-conditioned sleeping quarters. Each run also includes a ceiling fan. Although hounds are locked up every night, during the day they are allowed to frolic in two ample back yards. The runs and feeding bowls are cleaned with bleach every day. The proprietors also know every vet in the area. (House rules require that dogs be vaccinated against kennel cough and canine tracheobronchitis before they arrive.) Daily prices are proportionate to the dog's weight; they range from $10 for those up to 45 pounds to $20 for visitors that tip the scales at 117 pounds plus. But be forewarned; there is only room for 38 dogs. Major holidays and summertime are booked months in advance. And if you're a cat person, don't despair. They take felines, too.