Did Comfortis cause my cat's death with heart and kidney issues?

Thanks for using Petco Pet Education Center, formerly Petcoach and I’m so sorry to hear about Misty! If you want an answer you need to have her neceopsied (autopsy for animals). Fleas can kill a pet if there are so many they suck all the blood out of the pet. Typically we don’t see this in adult pets but it can happen. Because Misty died suddenly I would be more suspicious of underlying heart disease. Cats can have undiagnosed heart problems which can arise suddenly. If not, I would be concerned of a toxin. Again, it’s hard to say for sure but at least you know she didn’t suffer. My thoughts are with you and your family during this difficult time.

First off, I'm so sorry that you lost Arlo recently! Please accept my condolences for your loss. He was an older cat, and there are many things that could have caused him to lose weight such as kidney failure, liver disease, diabetes, hyperthyroidism, heart disease, or cancer. I think that you did not kill him with the collar. He had been losing weight for months already, and I do think whatever was causing that weight loss was the likely cause of him needing to be put to sleep. I hope this helps, and again, I'm sorry for your loss.

Hello, and thanks for your question on Petco Pet Education Center, formerly Petcoach. I'm so sorry to hear about your loss of Topanga. It's so hard to lose a beloved pet. It's difficult to speculate on all the "what-if's", what would have happened differently if Topanga had been treated a different way. However, if your vet suspected chronic kidney disease, that's a chronic, progressive, incurable disease, and nothing could have cured Topanga if that were the case. Additionally, it is a vet's job to help guide owners through the different options of treatment. If your vet gave you the option of treating Topanga from home with oral antibiotics, then I have to believe they thought that would give you a similar chance of improvement compared to the other options. With that said, the antibiotics were likely a "just in case" attempt to treat, just in case part of the problem with the kidneys was associated with a bacterial infection. But chronic kidney disease is rarely due to an infection - rather, it's an age related progressive disease that is common in cats. All in all, with the information you provided, I suspect you would have had the same outcome regardless of the method of antibiotic administration. I don't believe that your choice to treat her with oral antibiotics was the cause of her ultimately passing. I suspect it was simply the progression of an underlying incurable disease. I know none of that makes it easier to lose a loved one. It's so hard. But I hope this can provide some closure. I don't think you did anything wrong, and I don't think a different route of antibiotics would have changed the outcome. Hugs to you.

Hi and thanks for posting! The time each cat has when first diagnosed with chronic kidney disease does vary on the age of the cat and stage of the kidney disease. Cats that have this can do very well with great supportive and supplemental care. Kidney disease can be managed with prescription diets, certain kidney friendly vitamins, SQ fluid administration, and blood pressure medication if needed. While kidney failure is not typically painful, other secondary issues they can acquire may be, such as urinary or lung infections. Sometimes kidney disease can cause nausea which can be uncomfortable but not necessarily painful. Nausea is often treated in these patients with anti vomiting medications. Kidney failure patients may pass in their sleep, but not always. They can develop serious complications from compromised kidney function which can lead some owners to humanely euthanize them towards the end due to decreased quality of life. I hope this helps you and I thanks again for using Petco Pet Education Center, formerly Petcoach!

Do not think the revolution is involved. It is more likely to be related to an hyperacute accident, possibly an underlying cardiovascular disease (thromboembolism for example) possibly related to the kidney failure.

Hello. I am very sorry for your loss. I do not think any of the medications by themselves, or in combination contributed to Kassie's death. None of the medications were given long enough to cause any kind of toxicity level, & all were appropriate for trying to help her. Please accept my condolences for your loss.

Thanks for using Petco Pet Education Center, formerly Petcoach! I definitely understand how you feel and I am so sorry for your loss. It is very unlikely that this happened from applying too much flea medicine. This is more likely due to the other symptoms you mentioned including the diarrhea, difficulty urinating and fatigue. This could have been due to a disease that had not been identified. Again I am so sorry for your loss and I will keep you in my thoughts as you go through this difficult time.