( 19 ) who did not find a clear trend between attachment levels and heartworm preventative use.
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Factors associated with heartworm preventative use in the golden retriever lifetime study.
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The sentences
Concrete flooring may be significant as it may indicate a closer proximity of the dog to the house, whereas dogs kept on grass and dirt may include dogs that free roam and that receive poorer general care compared to confined dogs ( 18 ).