What dietary warning is mentioned concerning owners whose Dachshund lineage experienced heart issues later in life?

Answer

Long-term, exclusive use of grain-free foods

Owners whose Dachshunds developed heart issues later in life warned against long-term, exclusive use of grain-free foods, suggesting balance with wet food or fresh components.

What dietary warning is mentioned concerning owners whose Dachshund lineage experienced heart issues later in life?
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