05/23/2026
Blue-green algae is one of the most dangerous warm-weather risks many dog owners still donβt know enough about. β οΈπΆ
This toxic bacteria can grow in:
β’ ponds
β’ lakes
β’ slow-moving water
β’ standing water
It often appears as:
β’ green slime
β’ paint-like scum
β’ green surface streaks
β’ pea soup-looking water
Even small amounts can be deadly if ingested.
Dogs may be exposed by:
β’ drinking contaminated water
β’ swimming
β’ licking fur afterward
Symptoms can appear very quickly and may include:
β’ vomiting
β’ diarrhea
β’ weakness
β’ drooling
β’ seizures
β’ difficulty breathing
β’ collapse
If exposure is suspected, immediate veterinary care is critical.
When in doubt, itβs safest to keep dogs away from suspicious water entirely.