Dog Vaccination Schedule. Age. Vaccination. 5 weeks. Parvovirus: for puppies at high risk of exposure to parvo, some veterinarians recommend vaccinating at 5 weeks. Check with your veterinarian. 6 & 9 weeks. Combination vaccine * without leptospirosis.*Some puppies may need additional vaccinations against parvovirus after 15 weeks of age. Consult with your local veterinarian. Â§ According to the American Veterinary Medical Association, dogs at low risk of disease exposure may not need to be boostered yearly for most diseases.
In population genetics, directional selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.
Directional Drilling is more professionally known as âHorizontal Directional Drillingâ or HDD. As opposed to drilling natural gas or oil wells (drilling vertically), Directional Drilling is used for the installation of various kinds of underground utilities.When traditional excavation is not possible or cost effective, Directional Drilling is instituted.s opposed to drilling natural gas or oil wells (drilling vertically), Directional Drilling is used for the installation of various kinds of underground utilities. When traditional excavation is not possible or cost effective, Directional Drilling is instituted.