I bought these and they taste great. A Mexican buddy of mine at school let me have one and I was hooked. The only problem I had with these is that is was the Aldama brand and not Las Sevillanas but it is still a great tasting Oblea with cajeta and I plan to buy again.
The hook effect and false BFNs. Summarised, the hook effect is when someone continuously gets negative urine and blood tests but are actually pregnant. It happens because hcg levels are too high to register and is common with mothers carrying multiples or on older woman.
While mild cases of hookworm infection may cause diarrhea and weight loss, severe parasitism can cause anemia due to blood loss from the intestines where the worms attach themselves. In these cases, a cat's feces will often appear black and tarry due to the presence of digested blood in the feces.