Polyethylene glycol 3350 works by drawing water into the intestines, which can lead to diarrhea and other gastrointestinal side effects. It is generally not recommended for dogs because they can be more sensitive to its effects compared to humans. Additionally, the appropriate dosage for a dog would be significantly different from the dosage used in humans, and it is crucial to follow veterinarian recommendations when administering any medication to a pet.
If your chihuahua is experiencing constipation or other digestive issues, it is best to consult with a veterinarian for proper diagnosis and treatment. There are other safer and more appropriate medications and treatment options available for dogs, and a veterinarian can provide guidance on the most suitable course of action based on your pet's specific condition and needs. Self-medicating your chihuahua with human medications can be risky and potentially harmful, so it's important to always seek professional advice from a veterinarian.