Redness
It sounds like your guinea pig is experiencing some skin issues, particularly redness in the groin area. This could be due to several factors, including irritation, infection, or parasites like fleas or mites. Given that there are also symptoms like a bad smell, sticky skin, scabbing, and redness, it suggests that there might be an underlying infection or infestation.
For home care, you can start by ensuring your guinea pig's living environment is clean and dry. Regularly clean their cage and replace bedding to reduce the risk of infection and irritation. You can also gently clean the affected area with a mild antiseptic solution, but be very careful not to cause further irritation.
If the redness and other symptoms persist or worsen, it would be best to have a veterinarian examine your guinea pig. They can provide a more accurate diagnosis and appropriate treatment, which might include antibiotics or specific treatments for parasites.
If you have any further questions please ask us. Thank you.