We honestly are not sure if these products can be used together. We recommend you contact the manufacturers directly for more information. You can reach the Natural Guard Soil Activator manufacturer by using the link below:
http://www.fertilome.com/contact.aspx
Natural Guard Soil Activator can be applied a couple days after your first mowing for the season or when temperaturess reach above 55 degrees.
Natural Guard Soil Activator is safe for dogs when used as directed on label. They should not be present during the application also.