Outdoor living is fun for dog and master but summertime activities can put hazards in the path of an inquiring pet.

Gardening, painting, warfare against insects and rodents, and backyard barbecues are possible sources of canine poisoning.

Barbecues themselves, of course, are harmless. But the aluminum foil in which food is often broiled can choke him or lodge in his intestines. Don't leave foil, coated with meat drippings, where the dog can get at it. He'll probably try to chew the foil and, most likely, swallow some.

Place waste food in tightly closed, animal-proof garbage pails. Don't let perishable dog foods sit around too long in hot weather. They can cause severe intestinal upsets if eaten after they've begun to spoil.

Try to keep the dog away from areas treated with pesticides and don't spray places where the dog runs. Most of these products contain dangerous poisons.

Sometimes even inhaling pesticide fumes over a long period builds up toxicity and may eventually cause serious illness or death.

Lead poisoning is another canine killer. Don't use lead-base paint on dog houses, sleeping boxes, or any surface a dog might be tempted to chew. Keep the dog away from surfaces freshly covered with lead-base paints. If paint smears on his coat, he might be poisoned trying to lick it off.

All paints, insecticides, rodent poisons, turpentine, disinfectants, and similar products should be stored where the dog cannot come in accidental contact with them.

Secondary poisoning usually occurs when the dog eats a rodent that has died from poisoned bait. Most rodent poisons are particularly lethal and don't lose potency. They'll poison another animal as effectively as they did the creature for which they were intended.

If you set out poisoned bait, be sure it's where the dog can't sample it or a rat can't drag it into the open. Also check the dog's run frequently to make sure a poisoned rodent hasn't wandered into it, then died.

Nausea, trembling and pain are the most common early symptoms of poisoning. The owner's first step is to call a veterinarian and follow his advice. However, fast treatment is essential. Owners should have emetic and antidote on hand to use when immediate veterinary assistance is not available. When poisoning is suspected, first make the dog vomit, then administer the antidote. Equal parts of hydrogen peroxide and water, or a strong salt or dry mustard and water solution, induce nausea. When the dog has cleared his stomach, give activated charcoal for an antidote in recommended dosages for his weight and size. All supplies are available from any drugstore.

These steps are emergency first aid. Veterinary attention should be given the dog as soon as possible. The owner should note symptoms, as well as the possible cause of poisoning, for accurate diagnosis and treatment.

Supervised exercise is the best of all accident pre-ventatives. The dog on a leash, safely confined in a fenced yard, or walking with his master, has little opportunity to find poisons or trouble of any kind.