Do you know each other?  http://skipetriny.cz/doxycycline-hyclate-drug-interactions-0a52.pdf#cards doxycycline hyclate drug interactions  Guinea pigs can suffer from heart disease, just like any animal, but it’s rarely diagnosed and treated. They are good at covering up the problem, and are often not taken to the vet until it’s quite advanced. To confirm the diagnosis, investigations like X-rays and ultrasound are needed, but the cost can put people off. Treatment can include diuretics to remove fluid from the lungs, and other drugs to make the heart beat more strongly. Heart attacks are rare: instead, slowly declining heart function is more common, with coughing and difficulty breathing. You should take Wiki to your vet.