The following pictures and descriptions can be used to help you identify some of the most common Texas ant species. Once you know the species of ant in your home, you can determine where it is likely to nest, what kind of damage it causes, and what kind of control measures are most effective.
Heartworm infections may be occult for a number of reasons: A heartworm test is to check for the evidence of the parasite Dirofilaria immitis, more commonly known as heartworm, in your dog's bloodstream.
Heartworms have to be present for 6 months before they are detectable by a heartworm test. While it is possible for a dog to get heartworm at less than 4 months of age it is not common. If this truly is heartworm then I would likely recommend the immiticide treatment which is unfortunately the expensive one.