On rare occasions we are unable to obtain a result or we may identify issues with contamination of the original sample. For example, we have recently identified from a swab sample a peregrine that had recently eaten a great tit!
The actions we will take are as follows:
1. We will repeat the work through the laboratory, free of charge.
2. If we do not get a conclusive result, we will take the decision to re-sample and offer you this opportunity, however this can cause a delay to your expected completion date.
We have issues in the past with customers mixing up samples at their premises; please take care to sample each egg membrane or bird one at a time and to put the samples into clearly labelled tubes individually.
We do not recommend the use of swab samples. It is difficult to get enough sample from a bird of prey for this purpose and we are perhaps more likely to obtain the sex of the last meal.