Initially, it is important to understand why the dog is pulling on the lead. Is the dog excited to be on a walk or is the dog aggressing towards other dogs?
Here are some to look out for…
Daffodils
Effects from eating the bulbs of these early spring bloomers can include vomiting, stomach upset and salivation, but can escalate to dogs appearing sleepy, wobbly on their legs, or collapsing. In the serious cases fits and changes to heart rate, body temperature and blood pressure may also occur. Dogs can also become unwell if the flowers are eaten, or if water from a vase containing daffodils is drunk.

Tulips
The toxins found in this flower may cause irritation to the mouth and gastrointestinal tract and usually only result in drooling, vomiting and diarrhoea. Serious cases are rare, but effects could include heart problems and breathing difficulties.
Spring Crocus
Flowering in the Spring and of low toxicity and should only cause a mild stomach upset if eaten. These bulbs are not to be confused with autumn crocus, which flower in autumn and can cause severe stomach upset, kidney and liver problems and bone marrow depression.
Foxglove
While very beautiful with its trumpet like blossoms these plants are very poisonous to dogs, cats, and even humans! Foxglove contains naturally-occurring poisons that affect the heart, specifically cardenolides or bufadienolides.
For more information in this subject please visit www.thewoodlandtrust.org.uk