Hi, Thea :) It is always my pleasure to try to help out (though I may not always be the best qualified person around here to do so -- particularly with form poetry, as I write far more free verse than fixed forms) ... especially if it is appreciated. So, you're more than welcome. It's looks to me like you've gone a long way toward getting this rondeau in shape -- good job :)

Just to respond to a few of your comments:

Regarding the meter, the Rondeau is generally written in octosyllabic meter (8 syllables per line), but it does not have to be. It is, however, usually a very good idea to use a consistent meter throughout a poem. So, if you've begun with 9, you should stick with that. If you've begun with 8, stick with that. And so on.

I think "heart's on fire" translates just fine ... but it could be considered to be a bit cliche. If you like the line, I don't see a problem with it. Just adding in my thoughts!

The line with "acquire" is definitely awkward to me -- made particularly so by the use of "did", which is really acting as a filler word to meet the meter. I really think this line still needs some work, but I'm afraid I don't have any suggestions for you. If I come up with anything, I'll let you know!

I'd reconsider the change to the refrain in the final line -- but that is just my opinion. Hopefully, someone else will chime in here and let you know their thoughts! I think the fact that the cat is dead comes across in the poem and doesn't need to be said outright.

As far as enjambing between stanzas, I know that it can feel uncomfortable at first, but it is usually considered to be good practice in poetry. Think of it as being no different than carrying your thought from one line to the next (such as you've done in your final stanza here). The only difference is that there's a bit of empty space between the lines!

Hope that helps :)
Anyone can write of beauty -- of life, friendship, love everlasting -- but it is those rare, brave souls who dare to live their words that are the true poets of the universe. That is where true beauty lies. ~JaML