Sorry if I’m missing the point here, but poison MUST be used in a tamper proof bait station, NO exceptions. Unless your pets are also rodents, they cannot access the poisoned bait. I always also put a heavy weight on bait stations to prevent them being disturbed.
I live on a farm and rat control is a routine chore, but one we have to carry out to the current standards (and quite right too). You are doing the right things, i.e. making sure there is no shelter or sources of food or water. If you have clearly identified a rat infestation then a good quality rodenticide, applied competently is usually the best solution. It may be better to get a qualified person in to do it.
A lot of rodenticide is rubbish I’m afraid, especially the cheap stuff. This one works OK:
https://www.pestcontrolsupermarket....--professional-strength---30-x-100g-228-p.asp