Triclopyr takes weeks and weeks of spraying to get it under control. In your case, glyphosate is the best choice. Buy the stuff from Tractor Supply under their brand Groundworks 41% glyphosate. Mix it per the instructions and add some plain old dish detergent to help it stick. It's much cheaper than the brand name Round Up and will kill CC. Spray it when you won't be getting any rain for at least a couple days. The hotter the temperature the better it works. All you need is a good mist on the leaves of the plant. From there the leaves take it into the root to kill it. Expect a week to 2 weeks to see results as it takes some time to get the herbicide from the leaves to the roots and with creeping charlie you have to kill the roots or the stuff comes right back.. For most herbicides including Glyphosate, they work best when the plant is healthy and actively growing. This way the plant takes in more of the herbicide straight to the roots. You really need the folliage to absorb the herbicide. Sounds to me like you need to seek out another master gardener.

Some herbicides do not work unless it is above a certain temp and the weeds are actively growing such as spring and summer. You might have to wait until then to eradicate them.

Sorry to hear about your dog, Charlie. Goldens are very susceptible to cancer but I do not know which are common for them. It sounds as if you have not been to an oncologist yet. I do know that prednisone interferes so it is advised not to use it until all testing is done and an oncology plan is in place (if that is the path you choose to take). As far as treating cancer goes, know going in that they try to get a remission in pets, not a cure. The remissions are often short. Once they relapse, another remission is possible but is shorter. I have been through this several times now. It is very hard on our pets, very expensive and not much time, if any, is bought (quality of life, for what purpose, is another aspect). The oncologists are aggressive and will fight the disease to our pet's last breath. As their caretaker, know the specific cancer and typical outcomes to determine if it is right for you and your pet. Some cancers are slow, so treating can make sense if quality of life is good. I would never pursue the aggressive cancers again but will choose to let my babies go with dignity and in peace. Too early is better than too late. I do not want them used for research or for profit ever again.

Ok I have heard of "builder grade" being mentioned on this forum and various places. I didn't realize it was a type of bermuda, I interpreted it as some cheap bermuda the builder puts down:). We moved to this home couple of years back, so i mean't whatever the builder had put down 10 years back. No idea on the history of this lawn prior to our ownership to be honest. Our right side of the home has some junipers and we are always battling with hand-picking weeds and then laying pine-needles. This summer we decided to pull out these junipers and lay bermuda sod. I think the type if Tif 419. Yes I went the seed route for a small patch and it grew but it was a different green :) . It took ages to grow and I decided not to grow it.