I talked to the vets assistant yesterday and she said that Roomba is close enough to the 9.1lb weight that the flea medicine shouldn't harm her in any way. Thank goodness! Thank you all for your insight and advice about what might be going on with our little girl. I tend to get really nervous when it comes to our animals. You just can't be too sure. Thank you all again!
Well, I have two cats, right? One of them experienced side effects to flea treatment. The other one was fine all the time. Side effects: Redness, itchy skin, and hair loss. The third month everything was fine. But he did experience side effects. The product is Revolution, but it works beautifully!