If you’re thinking about providing your guinea pig with his own outdoor pen, choose your location carefully. Be sure you set your pet up on grass that has not been treated with chemical fertilizers or insecticides and that it has not recently been visited by other pets or wild animals that may have eliminated on it. Guinea pigs can become seriuosly ill if they consume contaminated grass, so be very careful.
If the temperature outside is above 26.7 degree Celcius, consider keeping your guinea pig inside. They are prone to heat stress and heatstroke, it’s one of the most common emergency conditions veterinarians treat in these pets. You’ll want to watch the temperature and humidity carefully to protect him from harm. Also, provide him with ample shade and plenty of fresh water to help keep him cool.
Finally, supervise you pet carefully whenever he’s outdoors. Predators such as stray cats, birds of prey, coyotes, or raccoons can quickly take a guinea pig, so you must be vigilant about protecting your pet