You are unhappy because you don’t have goals/ targets
If I were you I would try to branch out and include other services like grooming/training and any related field,also always hire part timers for walking, it’s time consuming and creates the least value. If you can find a land for rent/sale where you can set a playground and create other facilities you need, it might make your brand solid Ps you were happy when handling chaos and organizing things, I had that happen to me many times as I helped in the startup environment, I just created new goals and kept ticking them off,it might be the same thing happening to you and the solution might be the same, give it a try
I would personally shave off the debt, throw the maximum at it and finish it fast, yes you might not have high cash flow, but after paying that debt you will have enough freedom and a much higher cash flow allowing you to invest in the business without much risk, and probably at lower cost than what you have now