This is an old cliche but it is so relevant today. Especially with pet care in todays economic times.
Spend 5 dollars a month on Heartworm preventative and avoid a 400- 1,000 dollar bill for treating heartworms. Can't afford 5 dollas a month you say? I think most people could. Look at where you can cut back? Do you really need those 100 cable channels? That McDonald's breatkfast before work? Even if you never eat out, could you eat little less? Give up meat for a day or two. A bean and brown rice dinners if pack full of protein, fiber, and vitamins.
Another way to save on vet bills is to keep your fuzzy companion safe. Can't afford a super expensive emergency vet bill? Never ever let you dog or cat run loose where he or she could get run over by a car, attacked by another animals or shot or injured by another human.
Flexi leads are probably quite fun for your dog but humans have sustained serious digit injuries from these things (causing human emergency room bills) and dogs are also in serious danger because humans can't maintain control or gain quick control in an emergency situation. What if your dog is 20 feet in front of you and an aggressive dog runs out of nowhere (it happens!). How long will it take you to regain control?
Check out this posting: http://www.dogforums.com/2-general-dog-forum/52327-i-hit-dog-flexi.html