Years ago my vet recommended giving the cats a weekly treat, with one added ingredient - vaseline. Why? It is a highly effective and inexpensive way for the cats to pass fur balls. I had tried the gels at the pet store, the ones that "smell" like salmon. They never worked with my cats. Wasted money was all I accomplished with the purchase. I tried the vet's recommendation years ago and still use it today. Two treats held together with vaseline. If you are a cat owner, give it a try.
How about my readers -- what frugal pet care tips can you share?