Danny
Posted : 4/1/2006 4:50:44 PM
Hello [
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I guess that with "the same attributes" you mean to say that both claim they rid your pet of fleas and ticks. Otherwise, they are very different in their active ingredients. That is important in so far, as Frontline is actually one of the most effective squeeze ons there is, with often getting close to 100% results. Sentry gets considerably less (about 90% if I recall right), and furthermore contains a pesticide. Tthat means, an ingredient that has an established lethal dosage which is low - therefore it is a pesticide - and that requires special handling precautions as to federal regulations (for the pesticide in Sentry the LD 50 is 800mg/kg dermal and 430 mg/kg oral). Pesticides, even if given or applied in lesser volumes, can still cause damage through accumulation and/or cumulative interruption of physiological processes, and in worst case outright kill (remember, LD50 means that half of the test animals died; at lesser concentrations some might die also). With products like Sentry or Hartz vs Frontline and K9 Advantix it is simply like this: if one can afford it, get one of the latter two. They are more effective and less harmful. If one cannot or does not want to afford them, one should get one of the others, as they are often better than no protection at all, but then only apply them in the months where fleas and ticks are very active.
Hope that helps a bit [
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